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Linux has been described as one of the most secure operating systems available, but the NSA has taken Linux to the next level with Security-Enhanced Linux (SELinux). In this article explore the ideas behind SELinux and how it's implemented. SELinux takes the existing GNU/Linux operating system and extends it with kernel and user-space modifications to make it bullet-proof.

The JyDT plug-in enables Eclipse to work as a Jython/CPython IDE. In this tutorial learn how to configure the JyDT and a brief description of it. Learn to use the PyDev perspective and explorer, compile and run code, use the debugger, do unit testing, refactor, manage Python projects, and use the editor and IDE.

Client-side migrations are challenging due to their large scale, the potential uniqueness of each client system, and the direct impact on users. Learn the steps involved in migrating your environment to that of a Linux client. This article, Part 3, focuses on the next step: technical planning, after the organizational planning for desktop migration presented in Part 2.

Learn to monitor your systems resources, troubleshoot, and analyze system capacity in Part 6 of six tutorials on Linux certification exam 101 topics. Part 1 walks through LDAP concepts and architecture, directory design, and schemas. In Part 2 learn about server installation, configuration, and programming, then dive deeper into configuration in Part 3. Learn to search your LDAP tree and use command-line tools in Part 4, and how to integrate your server into Microsoft Active Directory in Part 5.

Based on customer experiences, this article offers a comprehensive guide to planning and executing your migration to a Linux client while minimizing disruption to your users. Learn the steps involve din migrating your environment, including organizational planning an user segmentation.

It's not that Linux isn't fast or efficient, but in some cases fast just isn't good 0enough. What's needed instead is the ability to deterministically meet scheduling deadlines with specific tolerances. In this article explore various real-time Linux alternatives and how they achieve real time—from the early architectures that mimic virtualization solutions to the options available today in the standard 2.6 kernel.

The Sony PlayStation 3 (PS3) runs Linux, but getting it to run well requires some tweaking. In the third and final article of this series on PS3 Linux Peter Seebach talks about ways to get X11 slimmed down to fit on a smaller memory budget.

Learn what's involved when introducing a Linux client pilot in your organization, including planning for business and IT requirements, architecture decisions, risks, and understanding how IBM's open collaboration client is used to implement this desktop of the future, today.

Recently there has been significant discussion of Linux's TCP SACK implementation, and its weakness within the Linux TCP stack. SACK is an optional feature of TCP necessary for effective use of all available bandwidth of some networks. However, processing this type of acknowledgment can be CPU intensive for the TCP sender, and thus a weakness which can be exploited by a malicious peer.

The Sony PlayStation 3 (PS3) runs Linux, but getting it to run well requires some tweaking. The first part introduced features and benefits, and Part 2 takes a look at where all the memory goes in the PS3 and how to reclaim it, along with what significant things can impact a PS3 system's performance running Linux.

Welcome to the next step in studying for the Linux certification exam 301 or just build your skills on Linux systems administration. In this tutorial you’ll walk though searching your LDAP tree and using the command-line tool, and learn to set up Microsoft Outlook to query your LDAP tree.

Two years ago we introduced five design patters, and now here are five more PHP design patterns to help accelerate your application development. PHP V5's object-oriented features give you the ability to implement design patterns to improve your code's design, so that it becomes more readable, more maintainable, and more robust to absorb changes.

The Sony PlayStation 3 (PS3) runs Linux, but getting it to run well requires some tweaking. This first article, Part 1, introduces the features and benefits of PS3 Linux, shows you how to use them effectively, and suggests the kind of trickery that might get improved performance or a more usable display.

Use the best open source tools to work with Web pages, scripts, and styles, and make development of new sites and pages easy. Inspect and modify HTML markup, CSS, and JavaScript on the fly, inspect the DOM and client-server communications, and learn how bookmarklets can make development safer and easier.

As the Xen open source hypervisor gains traction in many enterprises, you'll discover a need to provide fully redundant storage to the Xen environment from the host adapter all the way down to the hard drives. In this article, learn how to use Red Hat Enterprise Linux 5.1 to set up Xen and multipath storage access to the IBM System Storage DS4800.

This article shows how to develop and debug a graphical activity in Sugar using Python. The XO laptop includes many innovations such as an inexpensive and durable hardware design, the use of GNU/Linux as the underlying operating system, and an application environment written in Python with a human interface called Sugar, accessible to everyone (including kids).

Linux Pluggable Authentication Module (PAM) can help you protect world-writeable shared directories from abuse. This article for Linux system administrators lays out the steps to enable namespaces with PAM. The pam_namespace module creates a separate namespace for users on your system when they login to protect users from several types of security attacks.

Del.icio.us is a social bookmarking Web site that allows users to create and share browser-independent bookmarks. Surf the Web and have your del.icio.us tags, links, and functions handy, or a single page where you can save the site you're browsing directly into your account. This tutorial shows you how to use Ajax to build such a page using a PHP script as the server-side proxy.

Applications as well as users can retrieve protein and DNA sequences and data stored in flat-file databases in either EMBL or FASTA format, using SQL query language, with the EMBL/FASTA Wrapper for WebSphere Information Integrator. This technology runs on AIX, Linux, Java, and Windows platforms.

Menus, pop-up menus, and toolbars in Eclipse plug-in or RCP application can be tricky. No more! Eclipse V3.3 introduced a new mechanism that’s easier than ever, providing a more generic approach for configuring and adding menu items to accelerate plug-in and RCP development.